TABLE 1.

 Live recondensation of GFP-lac rep-ER-bound heterochromatic lac operator arrays induced by estradiol and antiestrogens in A03_1 cells

Treatment	% Original sizea	% SD	nb
10−9 M E2 (17β-estradiol)	52	22	16
2 × 10−6 M trans-hydroxytamoxifen	40	17	23
2 × 10−6 M ICI182,780	39	12	31
None	116	27	13

^aSizes of arrays were measured as in Fig. 3, and the size after 30 min of treatment was divided by the original size to determine the % original size.

^bn, number of cells examined.